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Ferromagnetic substances:
on the basis of domain theory
A. 1. In a ferro magnetic substance, large no. of domains occur.
2. The direction of magnetisation with in a domain is different from that in the neighbouring domains.
3. The boundary lines are indicate the domains and the arrow within domain indicates total magnetisation.
4. From fig, that the arrows with in the domain point along different directions.
5. As a result, the net magnetisation of the specimen as a whole is almost zero.
Q. What are uses of ultra-violet radiations? Uses of ultra-violet radiations: (i) They are utilized to destroy the bacteria and for sterilizing surgical instruments.
A simple pendulum Tie a cord at least 2 m long to some object like a stone or a small metal ball. Suspend this in a doorway or from a hook in the ceiling and begin it swinging
how to write aasignment on importance of physics
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if A=[30.1, 21.4 degrees] and B= [25, 40 degrees] what is the magnitude of the sum of these two vectors
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Does the force constant of a spring changes if it is cut into parts? Ans) Force constant does not change because it is a constant
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